I started my Canon MG6120 for the first time and received the following message: C000 Printer error has occurred. Turn off power and back on again. See the manual if problem persists." I have done so countless time to no avail. Manual has no such guidance with this issue. I think the scanning mechanism is failing during initialization.

Generic

Error C000 has also been known to be caused by poorly seated or unseated ink tanks. Another method that can be used to try and fix Error C000 is to open the printer door and make sure that all of the printer's ink tanks are properly seated.
Jun 25, 2021

FIX: Resolve Canon Printer Error C000 - Appuals.com

And specific to all Canon Printers.

https://www.google.com/search?q=Canon+Pixma+7240+code+c000

..

Motor code might mean you have to check the fuser the hot part, or the drums cartridge or the paper jammed inside

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

It usually means that it needs to be cleaned.
Take out the cartridges and look to see if there is build up.
That normally causes the error.

Try switching printer off then unplugging the power for 15 or so minutes. If that doesn't work and same error pops up when you turn printer back on, contact Canon.

good luck

Try turning off both the computer AND the printer. When it restarts, the two will reset and recheck and communicate.

Hi, try these two links, they might be of help. http://canoncanada.custhelp.com/app/answers/detail/a_id/11015/~/lcd-error%3A-error-c000
and
http://fix-your-printer.blogspot.com/2011/04/how-to-solve-error-c000-on-canon-pixma.html

Sounds to me that the printer will need servicing at canonusa.com.

http://www.usa.canon.com/cusa/support/consumer/printers_multifunction/pixma_mp_series/pixma_mp530?pageKeyCode=25

By the way, I didn't find a pixma mp540 but the closest was the mp530.

From the service manual, both errors relate to the scanner unit:

[5012] An error occurred in the scanner FB motor.
(1) Cable connection (2) Part replacement: - Scanner unit

[5050] The AFE was faulty.
(1) Cable connection (2) Part replacement: - Scanner unit

I don't know if the following YouTube video will help, but you could watch and see if it applies to your printer.

Error 5011 and 5012 Printer Canon MG 2570 MP 237 MP258

Purge cam sensor error [5C00] An error occurred in the purge unit. - Purge unit
- Logic board prbelom

I found a solution if you get an error code. I just bought a canon mp620 tonight from Best buy. I followed it to the letter as far as putting the ink in. Closed the lid and it made some God awful noise. The code was C000. You need to COMPLETELY push the ink tanks down underneath their respected sticker letters. Goto www.usa.canon.com look under support. Type in your model number and look under FAQ'S. I also had the error 5100 code. It explains with pictures and instructions what to do. Hope it helps anyone with trouble with the error code c000 and 5100